Article
Chemistry, Physical
Fan Zhang, Xiaoying Xu, Zhengpu Qiu, Bo Feng, Yuan Liu, Aihua Xing, Maohong Fan
Summary: This study focused on the design and performance of Cu/ZnO/Al2O3 catalysts, finding that the catalyst derived from highly zinc-substituted malachite exhibited the best catalytic performance. The research also revealed the copper specific surface area and exposed copper concentration of the catalyst, as well as the Cu/ZnO synergy.
GREEN ENERGY & ENVIRONMENT
(2022)
Article
Chemistry, Physical
Zhenzhou Zhang, Sifan Cheng, Wenqi Liu, Baojian Chen, Xinhua Gao, Peng Wang, Jian Gao, Yisheng Tan, Shanshan Dang, Weifeng Tu
Summary: By using reaction kinetics, TPR/TPD, N2O titration experiments, and in situ spectra techniques, this study reveals the mechanism of Mn promoter in regulating the catalytic activity and surface properties of Cu/ZnO/Al2O3 catalysts. The addition of Mn does not affect the methanol synthesis pathways, as confirmed by the unchanged methanol formation EA of Cu/ZnO/Al2O3 catalyst. However, an increase in Mn content leads to smaller sizes of Cu and ZnO, higher reduction degree of ZnO to Zn0, and more Cu-ZnOx active sites and surface species, resulting in higher methanol formation activity in CAZ-2%Mn.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Jorge Cored, Christian Wittee Lopes, Lichen Liu, Jose Soriano, Giovanni Agostini, Benjamin Solsona, Rita Sanchez-Tovar, Patricia Concepcion
Summary: This study presents a detailed understanding of the interactions among the active components in gallium promoted Cu/ZnO catalysts, depending on the speciation of the gallium, and their effect in the CO2 hydrogenation to methanol. The promoting effect of Ga3+-doped in the wurtzite ZnO lattice is compared to that of a zinc gallate phase. It is found that the Ga3+-doped ZnO sample exhibits a strong inhibition of CO formation and an enhanced methanol formation, particularly under conditions where the reverse water gas shift reaction predominates. The catalytic performance is correlated with the microstructure of the catalyst, including a surface enrichment with reduced ZnOx species, stabilization of positive charged copper species, and an increase in the amount of surface basic sites for CO2 adsorption.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Applied
Hangjie Li, Liang Wang, Feng-Shou Xiao
Summary: By introducing silica promoter, the Cu/ZnO/Al2O3 catalyst has achieved significantly improved methanol selectivity and catalyst durability.
Article
Chemistry, Physical
Thanh Truc Nguyen Hoang, De-Hao Tsai
Summary: The conversion of CO2 into valuable fuel or chemical feedstock through hydrogenation to methanol is important for sustainable technological development. This study proposes a combined (CO2 + CO) hydrogenation process for methanol production and develops Cu-based hybrid catalysts to enhance catalytic performance. The results demonstrate that incorporating CO into the CO2 hydrogenation process can significantly increase methanol yield at relatively low temperature and moderate pressure.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Engineering, Chemical
Siringul Ay, Murat Ozdemir, Mehmet Melikoglu
Summary: The addition of Cr and Mg promoters can improve the performance of Cu/ZnO/Al2O3 methanol synthesis catalysts, resulting in larger surface area, better dispersion, and higher methanol productivity. The co-addition of Cr and Mg helps to slow down the deactivation rates of the catalysts and shows regenerative characteristics.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Agricultural Engineering
Sabar Pangihutan Simanungkalit, Isabelle Jones, Chiemeka Onyeka Okoye, Zhezi Zhang, Mingming Zhu, Dongke Zhang
Summary: The possibility of direct methanol synthesis from biomass pyrolysis syngas using Cu/ZnO/Al2O3 catalysts was investigated. Methanol yield was influenced by temperature, pressure, and time on-stream. The presence of CO2 in the syngas resulted in decreased catalyst performance, while CH4 did not affect performance. This research provides insights into the challenges of producing methanol from unconventional syngas and motivates future work to develop a robust catalyst for H2-deficient and CO2-rich syngas.
BIOMASS & BIOENERGY
(2023)
Article
Energy & Fuels
Fei Chen, Weizhe Gao, Kangzhou Wang, Chengwei Wang, Xuemei Wu, Na Liu, Xiaoyu Guo, Yingluo He, Peipei Zhang, Guohui Yang, Noritatsu Tsubaki
Summary: In this study, Cu/ZnO/MgO catalysts were prepared and tested for low-temperature methanol synthesis. The results showed that Cu/ZnO/MgO catalysts exhibited higher methanol yield and stability compared to Cu/ZnO catalysts. Furthermore, Cu/ZnO/MgO catalyst demonstrated higher space time yield of methanol compared to other reported Cu-based catalysts.
Article
Chemistry, Physical
Qing Guo, Shaozhong Li, Jin Li, Yongke Hu, Chuansong Duanmu
Summary: Research has shown that optimizing the microstructure and surface properties of mesostructured Cu-ZnO/Al2O3-ZrO2 (CZAZ) catalysts, especially by adjusting the weight ratio of Al2O3 and ZrO2, can improve the catalytic performance of CO2 hydrogenation to methanol. The addition of ZrO2 enhances the catalyst's basic surface, while smaller Cu particles increase the interfaces of Cu with ZnO, thereby improving the selectivity to methanol.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Ying Liu, Xiaofang Liu, Lin Xia, Chaojie Huang, Zhaoxuan Wu, Hui Wang, Yuhan Sun
Summary: Catalytic hydrogenation of CO2 to methanol is a promising method for mitigating global warming and reducing reliance on fossil fuels. The addition of CO in the reaction can inhibit the reverse water gas shift reaction and improve methanol production. Cu/ZnO/Al2O3 catalysts prepared from different precursors exhibit better activity and long-term stability when CO is incorporated.
ACTA PHYSICO-CHIMICA SINICA
(2022)
Article
Energy & Fuels
Inigo Perez-Miqueo, Oihane Sanz, Mario Montes
Summary: The effect of different inorganic oxide colloids on Cu/ZnO/Al2O3 catalyst washcoating was investigated, and Al2O3 showed the best adherence. However, the addition of colloids changed the catalytic properties, reducing the active surface area and causing methanol dehydration to DME with Al2O3 and weakening the acidity with SiO2. ZnO's basic nature reduced the selectivity to DME. A slurry formulation with 10% Al2O3 exhibited the highest methanol yield.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Article
Chemistry, Physical
Hironobu Sugiyama, Nobuhiro Nakamura, Satoru Watanabe, Junghwan Kim, Masaaki Kitano, Hideo Hosono
Summary: The study found that electrically conductive and low work function silicon-doped zinc oxide (ZSO) nanoparticles can promote the hydrogenation of CO to methanol by Cu catalysts, allowing for the synthesis of methanol under mild conditions.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Hironobu Sugiyama, Nobuhiro Nakamura, Satoru Watanabe, Junghwan Kim, Masaaki Kitano, Hideo Hosono
Summary: Researchers synthesized Zn1-xSixO nanoparticles with tunable work function and carrier concentration by a thermal plasma method. They found that electrically conductive ZSO nanoparticles with a low work function promoted the hydrogenation of CO to methanol, while insulating ZSO nanoparticles with a similar low work function did not. This suggests that efficient electronic promotion plays a key role in low-temperature methanol synthesis.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Bingqiao Xie, Priyank Kumar, Tze Hao Tan, Ali Asghar Esmailpour, Kondo-Francois Aguey-Zinsou, Jason Scott, Rose Amal
Summary: This study investigates the promoting effects of two dopants – Mg and La – on metal-support interaction and catalytic performance in thermal and light-assisted methanol synthesis over the Cu/ZnO/Al2O3 catalyst. The results show that the dopants can enhance the catalytic efficiency by enriching interfacial oxygen vacancies and improving the Cu-ZnO interaction. Additionally, the La-doped catalyst demonstrated enhanced methanol selectivity by modulating the adsorption states of intermediates.
Article
Chemistry, Physical
Xiaojing Cui, Yequn Liu, Yangang Mei, Jiamei Li, He Zhang, Shanhui Zhu, Yulan Niu, Tiansheng Deng
Summary: A surface silylation method is found to efficiently suppress the reverse water-gas-shift reaction on a commercial Cu/ZnO/Al2O3 catalyst, leading to improved methanol selectivity and yield.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
